I used to fly a PT-19 all the time, but what makes it a great experience is to replace the single port cylender with a double. That will up the power a lot. Extend the control lines about 10 feet more that the usual (instructions say 25 ft), and most of all ... replace the landing gear with skid wire. We used to fly combat with these, and get them inverted by doing a wing-over the top of the circle, but start pulling out as soon as you get to the top of the circle. Getting back is harder, but possible. It just takes a couple of times around to get the altitude to whip it around. Lots of fun, and hard to damage the plane if you fly on grass. Cox has started re-manufactuing the PT-19 again as a nostalic model.